Bump copy-webpack-plugin from 5.0.4 to 6.1.0

Bumps [copy-webpack-plugin](https://github.com/webpack-contrib/copy-webpack-plugin) from 5.0.4 to 6.1.0.
- [Release notes](https://github.com/webpack-contrib/copy-webpack-plugin/releases)
- [Changelog](https://github.com/webpack-contrib/copy-webpack-plugin/blob/master/CHANGELOG.md)
- [Commits](webpack/copy-webpack-plugin@v5.0.4...v6.1.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

package.json

@@ -33,7 +33,7 @@
     "@babel/preset-env": "^7.5.5",
     "@babel/preset-react": "^7.0.0",
     "babel-loader": "^8.0.6",
-    "copy-webpack-plugin": "^5.0.4",
+    "copy-webpack-plugin": "^6.1.0",
     "dotenv": "^8.2.0",
     "file-loader": "^4.2.0",
     "gh-pages": "^2.1.1",